Siheyuan: From the Start, I Offer Jia Dongxu as a Sacrifice in Year Sixty

(Multiple female leads, but they aren't the main focus. Don't read if that bothers you.) (No goody-two-shoes.) (Not too much hostility.) (Focuses on personal development.) Chen Zhuo is in a car accident and transmigrates into the body of an unnamed passerby who starved to death in a courtyard house. He sets out to trade for some food, only to run into Jia Dongxu, who is being carried back. Then he discovers that Jia Dongxu is the key to unlocking a portable dimension?